priority of overlays vs text-properties

priority of overlays vs text-properties

[Klaus Berndl]

Suppose i add a face with color "red" to a text "XXX" in current buffer.
Then i define an overlay and add a face-property to this overlay which has
color "green". This overlay should cover the whole buffer (maybe senseless but
it's just an example)!

Ok, now my question: Is the text "XXX" (which has "red"-text-properties, see
above) displayed now green or red?

many thanks in advance!
Klaus

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Re: priority of overlays vs text-properties

[lawrence mitchell]

Klaus Berndl wrote:

> Suppose i add a face with color "red" to a text "XXX" in
> current buffer.  Then i define an overlay and add a
> face-property to this overlay which has color "green". This
> overlay should cover the whole buffer (maybe senseless but it's
> just an example)!

> Ok, now my question: Is the text "XXX" (which has
> "red"-text-properties, see above) displayed now green or red?

/----[ Elisp manual (Info-goto-node "(elisp)Overlay Properties") ]
|      Currently, all overlays take priority over text properties.
\----

So it seems the text would be green.

-- 
lawrence mitchell <wence@gmx.li>

Re: priority of overlays vs text-properties

[Ehud Karni]

On 05 Sep 2002 16:42:02 +0200, Klaus Berndl <Klaus.Berndl@raibau.raiffeisen.at> wrote:
> 
> Suppose i add a face with color "red" to a text "XXX" in current buffer.
> Then i define an overlay and add a face-property to this overlay which has
> color "green". This overlay should cover the whole buffer (maybe senseless but
> it's just an example)!
> 
> Ok, now my question: Is the text "XXX" (which has "red"-text-properties, see
> above) displayed now green or red?

It will surly appear in green color (I use this all the time).

If you have more than 1 face-property overlay on the same text then
the face that is shown depends on the priority of the overlay, the
higher priority (larger number) will be shown.   Use:
       (overlay-put <overlay-name> 'priority <priority-value>)
to set the overlay priority.

Ehud.


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